Ventilator.



F. HERTACH 6L F. G. FAY.

VENTILTOR. APPLICATION FILED Nov. 5, 1913.

Patented 001;. 31, 1916.

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FRED HEB/.FACH AND FRANCIS G. FAY, 0F LYNN, MASSACHUSETTS.

VENTILATOR.

Application filed November 5, 1913.

current of air upwardly through and outi wardly of the ventilator, also acting to effectually prevent the accumulation of dead air, smoke, or the like, in any part of the ventilator.

lt is also a'n object of the present invention to provide a revolving ventilator which will be strong and durable in construction, economical to manufacture, and simple in its construction and operation.

In the construction of revolving ventilators or chimney cowls as heretofore made, great difficulty has been experienced in providing a cowl which will stimulate the draft up through the chimney to which the ventilator is attached, as well as through the ventilator itself, many efforts along this line having been heretofore made. rEhe ordinary chimney cowl or revolving ventilator creates an eddy directly in the open mouth of the ventilator, as well as in the top or roof of the ventilator itself, thereby tending to choke up the chimney and to depress the upward tendency of the draft, air current, smoke, etc. Attempts to overcome this difficulty have been made by cutting openings in and through the side walls of the cowl, providing tubes, funnel shaped members and the like, within the cowl, but all such devices have been unsatisfactory. Many openings in the ventilator created increased eddies, while tubes, funnel shaped members, etc., within or through a part of the interior of the cowl tended to create a greater increased area of dead air space than when such funnels were omitted, and thereby tended to clog the draft instead of increasing the same. We have discovered that by providing an opening or openings, preferably two, near the top portion of a chimney cowl of special design, preferably one having a closed pointed end, then forming air congestors on the outside of the cowl Specification of Letters Patent.

Fatented @et 31, 192th.

Serial No. 799,315.

to register with said openings, all dead air, smoke, and the like is effectually eliminated and the draft or current of air is increased and stimulated upwardly through the chimney and outwardly through the entire area cf the ventilator.

Other features of the invention, details of construction and novel combinations of parts, will be hereinafter more fully pointed out and claimed.

Referring to the drawings, illustrating a preferred embodiment of the invention, Figure 1 is a side viewY of our improved ventilator; Fig. 2 is a rear view, looking from the left of `Fig. 1; and Fig. 3 is a front view of the ventilator, looking from the right, viewing Fig. 1.

Uur improved type of ventilator is preferably of a form having a closed and pointed portion held against the direction of the wind, although the novel features may be employed in other types of ventilators, as will be readily understood. A fixed pipe section 1 is adapted to fit on the top of any pipe or chimney to which the ventilator is to be attached, this section 1 being held rigidly on the pipe or chimney, and is arranged to support rotatably the revolving portion of the ventilator, comprising a lower pipe portion 2 and the main upper funnel shaped section 3, having one end 4 closed or pointed against the direction from which the wind will strike the ventilator, and its other flaring end portion 5 open. Around the iiaring open portion may be affixed an end guide 6 of wellknown type, by means of short double angle irons 7 and 8, suitably bolted to the exterior of the portion 3 and the inner side of the guide 6. A vane 9 is also affixed to the ventilator, and to the guide 6, as indicated at 10, being also preferably braced by iron straps 11 and 12, as clearly shown in the drawings.

ln the lower portion 1, we secure at right angles to each other and at a substantial distance .above and below each other, the cross rods 13 and 14:, each having shoulders 15, bearing against the inner portions of the pipe section 1 and caps 16 threaded thereon and bearing upon the outer surface of the pipe 1, thus firmly uniting the cross bars to this pipe. Each cross bar carries a pipe union 17, preferably each cross bar 13 and 14; comprising two short lengths threaded into thev respective sides of the pipe union 17 as illustrated in the drawings. These cured to the sides'of. the pipe portion 2 byV shoulders 22 and threaded caps 23 thereon 'two unions 17 afford af bearing for the central stem 1S stepped therein, and extending `upwardly through the center ofthe pipe 1 and the section 2, to a pivotal bearing 19 at the uppermost portion ofthe section 3. A second bearing for the revolving portion of the ventilator is provided by a cross bar 20, having a union 21 through which the pipe 18 bears, and which cross bar comprises two sections threaded into the union 21 and sein a mannersi'milar to that described in con- Ving'portion of the Vcowl or ventilator.V

f nection with the crossbars 13 and 14. This unions 17 keeps the same in assembled po-V vsition.

Y lnthe conical portion 3 of the ventilator, we provide openings' 25 and 26 approximately equi-distant from the pivot 19 and preferably beingY slightly triangular in form. We may yalsoincrease the triangular section by depressing the Walls 27 and 28 in the conical portion 3, as shown in Figs. 2 and3. To the outer surface of the conical portion 3,we afx funnel shaped members 29 and 30, adapted torregister with lthe openings 25 and 26 respectively. These funnel shaped members we term air congestors, fas the opposite Vends of, each of these air congestors are preferably much largerrthan the openings 25 or 26 through the conical member 3 with which'the respective members 29 and 3() register. These oongestors are in fact opening toward thedirection from which the wind is blowing,

Vand increasing the velocity of the wind by congesting the area through-which it must pass to deliver an increased current through the openings 25 and 26. As these openings are near the top of the ymember 3, the increased volume of air thus delivered will create i a draft Vupwardly and outwardly through the flaring opening' in the ventilator and thereby'initiate and stimulate .a draft upwardly through the pipe portions l and 2 and outwardly through theY ventilator. This construction also effectually prevents r'any eddymg of air currents around v,the sides ofthe revolving portion of the ventilatoigand into the opening 5,'but instead creates a draft directly out through Vthe upper portion of the ventilator. These air congestors'also act to prevent any ac` cumulation of smoke, in the ventilator, but

serve to clear out the same by the initiation ofthe upwardly and outwardly draft.V ByA having the air congestors29 and 30 on the exterior of the ventilator, the interior is left without any devices which would tend to create an eddy or facilita-te the accumulation of dead air smoke and the like, which latter are very objectionable as tending to deaden the draft, as already explained. While we may provide a plurality of such air congestors and openings, we iind that the best results have been obtained with the use of two, one at either side of the pivot, thus permitting the main draft or current of air to pass upwardly through the ventilator between the two air congestors, which latter have the effect of stimulating such current, as well as the tendency to create a draft in the proper direction upwardly and outwardly through the uppermost portions of the ventilator. These air congestors 29 and 30 may be of any funnel shaped form, but are preferably made as attachments to the conical member 3, utilizing the inclination of the latter for the congesting effect, the sides forming the congestor being but slightly Haring. This construction simplifies the manufacture and renders an economical product possible. In practice, the air .congestors 29 and 30 may be cut out of sheet material, bent to substantially proper form, and provided with Iianges 32 and 33, which will rest along the outer side of the conical member 3 and may be secured thereto by a series of bolts 34.

Having described our inventionq what we claim as new and desire to secure by Letters Patent is:

An apparatus of the kind described, comprising a rotatable ventilator, having ay horizontally disposed pyramidal form, pivotal supporting means therefor, spaced .apart triangular openings in the upper walls of said horizontally disposed portion and at either side of the pivotal supporting means in substantially balanced Yrelation thereto, and a pair of circular funnel shaped air conductors on the outside of said horizontally disposed pyramidal portion opening toward the pyramidal point and converging to and registering with one of each of said triangular openings respectively, whereby a balanced air resisting construction on the exterior and a substantially smooth non-eddying construction on the interior ofthe ventilator is provided.

In testimony whereof, we have signed our names to this specification, in the presence of two subscribing witnesses.

FRED HERTACH. FRANCIS G. FAY.

Witnesses Y HANNAi-I S. HERTACH,

MoUL'roN Gr. CHASE.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents Y Washingtonyllc, 

